Firing and trigger mechanism for self-loading match pistol

Abstract

A firing and trigger mechanism for increasing the accuracy of firing in which a hammer and a firing spring are held in a cocked position and in engagement with one arm of a bell crank. The other arm of the bell crank is engaged by a hammer catch that is connected with a trigger through a triggering rod resiliently urged to the hammer catch. The bell crank is resiliently urged against the hammer and the hammer catch by a spring, having one end bearing against the hammer catch. With the hammer in a cocked position, the spring urges the hammer catch against the bell crank, and as the latter are brought out of engagement, the bell crank loads the spring with an additional force that compensates for the friction forces between the bell crank and the hammer catch. These forces disappear when the bell crank and the hammer catch are disengaged. The spring allows the pressure on the trigger to be maintained substantially constant until the moment the bell crank is disengaged from the hammer catch, and after they have been disengaged.

What we claim is: 
     
       1. A firing and trigger mechanism for a self-loading match pistol mounted in a frame thereof; comprising: a hammer pivotably mounted on said frame of said pistol; a plunger operatively connected with said hammer; a firing spring received about said plunger; a bell crank pivotably mounted on said frame of said pistol; a hammer catch pivotably mounted on said frame of said pistol; said bell crank when in a cocked position of said hammer having one arm thereof engaging said hammer and having another end engaging said hammer catch; a spring having one end thereof bearing upon said bell crank and another end thereof bearing upon said hammer catch; a trigger pivotably mounted on said frame of said pistol; a triggering rod having one end thereof operatively connected with said trigger and having another end thereof operatively connected with said hammer catch and being resiliently urged to said hammer catch by auxiliary spring means; said spring being arranged so that with said hammer in a cocked position said spring urges said bell crank to said hammer and to said hammer catch, upon disengagement of said hammer catch and said bell crank said bell crank loading said spring with an additional force compensating for the loss of the force of friction between said bell crank and said hammer catch, and disappearing at the moment of disengagement of said hammer catch and said bell crank. 
     
     
       2. A firing and trigger mechanism as claimed in claim 1, wherein said spring urging said bell crank and said hammer catch is a torsion spring mounted on the pivot pin of said hammer catch.